Its a job I certainly wouldn't like to do, especially in front of some of the fans who frequent these boards.

Maybe they should bring in the old Sunday league rule of one sub from each side reffing a half each. The penalty counts would even themselves up after half time...oh wait there...

The Video refs have already made use of a "virtual" line across the screen/pitch, this line being at right angle to the touch lines, for the purpose of determining off side at a kick.

Using the same "virtual" line by the video refs will certainly help to determine whether the ball has left the passers hands in a forward direction - if the ball crosses the line it is a forward and momentum would not be a concern. It is certainly worth using the system where a try is scored following a possible forward pass.

For that to work the virtual line couldn't be a static one like that used for offside. It would need to be a moving one. One moving in the same direction and speed as the ball was immediately prior to the ball leaving the hands of the passer.

But the pitch is a 2d area.

When looking at passes, any change in altitude resulting from the pass can cause confusion.

The best ref is the one that is reffing someone else's match.